A 3D computational fluid dynamics model with a reduced detailed chemical kinetics of the combustion of diesel and methane fuels is developed while considering turbulence during combustion to simulate the mixture flow, formation, and combustion processes within diesel and diesel/methane dual fuel engines having swirl chambers. The combustion characteristics of the pilot injection into a small prechamber are also investigated. Modeled results were validated by a group of corresponding experimental data. The spatial and temporal distributions of the mixture temperature, pressure, and velocity under conditions with and without liquid fuel injection and combustion are compared. The effects of engine speed, injection timing, and the addition of carbon dioxide on the combustion process of dual fuel engines are investigated. It is found that in the absence of any fuel injection and combustion, the swirl center is initially formed at the bottom-left of the swirl chamber, and then moved up with continued compression in the top-right direction toward the highest point. The swirling motion within the swirl and main combustion chambers promotes the evaporation of the liquid pilot and the combustion processes of diesel and dual fuel engines. It was observed that an earlier autoignition can be obtained through injecting the pilot fuel into the small prechamber compared with the corresponding swirl chamber operation. It is to be shown that reduced engine emissions and improved thermal efficiency can be achieved by a two-stage homogenous charge compression ignition combustion.
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January 2009
Research Papers
Three-Dimensional Computational Fluid Simulation of Diesel and Dual Fuel Engine Combustion
Chengke Liu,
Chengke Liu
Department of Mechanical and Manufacturing Engineering,
University of Calgary
, 2500 University Drive, Northwest Calgary, AB, T2N 1N4, Canada
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G. A. Karim
G. A. Karim
Department of Mechanical and Manufacturing Engineering,
karim@ucalgary.ca
University of Calgary
, 2500 University Drive, Northwest Calgary, AB, T2N 1N4, Canada
Search for other works by this author on:
Chengke Liu
Department of Mechanical and Manufacturing Engineering,
University of Calgary
, 2500 University Drive, Northwest Calgary, AB, T2N 1N4, Canada
G. A. Karim
Department of Mechanical and Manufacturing Engineering,
University of Calgary
, 2500 University Drive, Northwest Calgary, AB, T2N 1N4, Canadakarim@ucalgary.ca
J. Eng. Gas Turbines Power. Jan 2009, 131(1): 012804 (9 pages)
Published Online: November 20, 2008
Article history
Received:
February 19, 2008
Revised:
July 25, 2008
Published:
November 20, 2008
Citation
Liu, C., and Karim, G. A. (November 20, 2008). "Three-Dimensional Computational Fluid Simulation of Diesel and Dual Fuel Engine Combustion." ASME. J. Eng. Gas Turbines Power. January 2009; 131(1): 012804. https://doi.org/10.1115/1.2981175
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